Bearing construction



Oct. 1l, 1932. F. J. JARvls 1,882,497

BEARING CONSTRUCTION Filed Jan. 2, 1929 Vgfl @U4/wg# vga@ @Wonne/.3'

Patented ct. 11', 1932 iJNITED l STATES ra'relw ori-Ice FRANK J. JARVIS, F PALMER, LIASSACHUSETTS, ASSIGNOR TO JARVIS & JARVIS, INC.,

OFVPALMEB, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS i BEARING CONSTRUCTION Application filed January 2, 1929.'` Serial No. 329,699.;M

This invention relates to improvements in bearing constructions and has particular reference to an improved bearing construction for a `wheel support and the like and to a new process for making the same.

, The` principal object of the invention is to provide an improved process for making a bearing construction that will positively maintain its alignment, to insure the free and equal running of the bearing under al conditions.

Another object of the invention is to provide an improved bearing construction that will maintain the positive alignment of the working parts.

l lowing description taken in connection with Another object of theinvention is to provide simple, eiiicient and economical means for producing a positively maintained alignment fora vfree running bearing.

Another object of the invention is to provide an improved bearing pintle and. process for constructing and aligning the same.,l

Other objects and advantages of the `invention will become apparent vfrom the folthe 'accompanying drawing, and it will be apparent that many changes may be made in the arrangements of parts, details of construction and steps of the process without departing from the spirit of the invention as expressed in` the accompanying claim. I, therefore do not wish to be limited to the exact details and arrangements shown and described as the preferred forms onlyhave been shown by way of illustration.

rivet connections wasliable to 'work loose and allow the pintle to turn, thus throwing out the alignment of the bearing parts. Many of these devices were free running only in their original alignment. If the pintle became` loose the alignment wasvdestroyed and the bearing 'surfaces would bind, thus making the parts either-hard to operate or locking themall together. It is, therefore, the prime object of my invention to' provide a simple, eflicient and inexpensive pintle construction thatwill prevent this loss of alignment and insure the'inaintenance of a free and easy running bearing throughout the lifeof the device. l Y Y Referring to the drawing wherein similar reference characters denote corresponding parts throughout, a top orswivel plate 1 is provided with a pintle openingv 2 having the countersink 3 at the outer edge of the swivel r plate 1. lThe swivel plate 1 is also provided with a circular ball race 4. The swivel plate 1 is attached tothe retaining object 5 b` means-of the bolts 6. The bearing pintle is conicallytapered at 8, the small diameter being at the top 9. Beneath the taper `8, are

the shoulderV 10,i the flange 11 and the shank 12, the shank 12 being threaded.

The pintle 7 is inserted in the opening 2 in the swivel plate 1, the portion 10 fitting in the uncountersunk portion of the opening 2 and the tapered part 8 extending into the countersunk portion 3 and the upper side ofthe flange 11 engaging the under side of the plate e 1. The shoulder lOYand the surfaces of the flange 11 are truly made sothat when the pintle is inserted inthe opening 2 it is aligned in true bearing position. After the pintle 7 has been inserted in the opening 2. it Vis welded, preferably electrically welded, into position, the molten metal of the welding filling in the space betweenzthe part 8 of the l pintle and the countersink 3 of the swivel plate 1, this being indicated by the triangular piece 13 in Fig. I. This welding. operation has the'elfect of uniting the pintle 7 and the swivel 1 asthough they were one piece of material giving the effect of an integral construction. After the pintle 7 has been welded into the opening 2 the top portion yof the pintle and the welding material 13 are plated off smooth to the surface of the top of the swivel 1 so that the swivel 1 and the pintle 7 are in effect one piece of material. Threaded on the shank 12 of the pintle 7 is a bearing cone 14 having the fillet 15 which acts as a ball race and the extending flange 16 formed into 'a nut by which the cone 14 may be Screwed onto or taken off .0f the pintle 7. The inner edge of the cone 14 is fitted around the flange 11 of the pintle 7 and the pintle 7 extends beyond the lower edge of the-conele.k

A lock nut 17 and cotter pin 40 are proy vided to maintain theb cone 14 onlv the pintle 4. top bracketY 18 is provid-ed with a ball race 19 aligned with the ball race 4 in the swivel plate 1 and it is also provided with a ball race 20- aligned with the ball race 15 of1 the` cone 14.- Ball bearing vmembers 21 are placed lin the ball races 4 and-19 of the swivelplate 1 and the bracket 18 respectively, and'ball bearing members 22 are placed in the ball races 2O and 15 of the bracket `plate V18 and the cone bearing 14, respectively. Side support plates 23 have the flanges 24 which are secured to the top bracket plate 18 by means of the rivets 25 or other Aconnecting means. These bracket plates 23 act as the bearing support-for the wheel 26, the wheel being rotatably supported between the said bracket plates 23; The wheel 26 is rotatably mounted on'the wheel spindle 27, being held inV place by thev nuts 28 or other well known -retainingdevices Between the hub 29 of the wheel`26 and the bracket plates are the spacer, washers 30.

y The assembly and operation of the device are as follows: The pintle 7 is carefully aligned to true position and dimensions to produce the taper 8, body or shoulder 10,v

flange 11 and shank 12. The hole ofthe countersink 3 is carefullyaligned and shaped in the swivel plate 1; The pintle 7 is. then entered into the opening 2 in the swivel `plate 1 and the parts. welded together as has been described. The top bracket plate is then placed in aligned position with the swivel 1, the balls 21 being inserted in the ball races between these two parts. The cone 14 is next entered on the pintle 7 and the balls22 inserted in the ball races between the cone 14 and top bracket plate 18. The cone is adjusteduto position and locked in place on the pintle 7 by the lock nut 17 and cottervpin 40. The side bracket plates 23 have previously been bolted in place on the top bracketV plate 18 and the wheel 26 mounted between the bracket plates asdescribed.

of the wheel 26 on its support. It will be particularly noted that once the pintle 7 has been welded to the plate'l as described it becomes an integral part thereof andthemaintenance of its alignment is assured. The

pintle 7 cannot move from its relatedy position with the top plate 1, thus insuring that once the bearing is aligned for free and easy running thatJ alignment will be maintained throughout the. life of the device.

From the foregoing description it will be seenthat Ihave provided simple, efficient and economicalmeans for carrying out all of the objects of the invention and particularly for maintaining the initial or original alignment of the parts.

Having-described my invention, I claim.:

In a device of thev character described, a support plate having an opening therein, a retaining pin havingy acollar ofY` larger diameter than the pin and positioned intermediate the ends of the pin, one end of the pin extending into the opening of the support plate and one side of the collar abutting the surface of said support plate adjacent the opening therein, the portion of thepin' eX- tending-into saidl opening being welded to saidfsupport plate to integrally secure it thereto, a bushing on the portion of-'the pin exterior of the support plate, said bushing having. a recessedfportion receiving the said collar on the-pin, a wheel supporthavingv depending side plates and a connecting section, said sectionhaving anopening through which the bushing extends, ball bearings betweenthe bushing; and connecting section of the wheel support, ball bearings between said section and-'the support plate, and a wheel rotatably mounted'between the depending plates of thewheel support.

FRANK J. JARVIS.`r

In operation it `will be seen that the top f 'together allowing free running adjustment 

